/Engine/Source/Developer/CookedEditor/Public/CookedEditorPackageManager.h
Allows the subclass to disallow some assets to be gathered during AddPackagesFromPath, for instance This is similar to AllowObjectToBeCooked, but it can help with, for instance, removing maps from subdirectories, while still allowing the normal maps that come from the standard cooking process
virtual bool AllowAssetToBeGathered ( const struct [FAssetData](API\Runtime\CoreUObject\AssetRegistry\FAssetData) & AssetData ) const